15047391 has 4 divisors (see below), whose sum is σ = 20063192. Its totient is φ = 10031592.

The previous prime is 15047339. The next prime is 15047399. The reversal of 15047391 is 19374051.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15047391 - 2⁶ = 15047327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15047399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2507896 + ... + 2507901.

It is an arithmetic number, because the mean of its divisors is an integer number (5015798).

Almost surely, 2^15047391 is an apocalyptic number.

15047391 is a deficient number, since it is larger than the sum of its proper divisors (5015801).

15047391 is an equidigital number, since it uses as much as digits as its factorization.

15047391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5015800.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 15047391 is about 3879.0966731960. The cubic root of 15047391 is about 246.8806594013.

The spelling of 15047391 in words is "fifteen million, forty-seven thousand, three hundred ninety-one".